A cable protection testing device for bridges

Abstract

This invention relates to a cable protection and inspection device for bridges, applicable to the field of bridge inspection. It includes a non-destructive pre-climbing device, a climbing mechanism, and a detector connected to the climbing mechanism. First, airflow propels the non-destructive pre-climbing device upwards around the cable without tightly gripping it, thus minimizing secondary damage to the cable surface, until it reaches the top of the cable. After the non-destructive pre-climbing device grips the top of the cable, a replacement rope is used instead of the cable as the climbing carrier, allowing the climbing mechanism to climb along the replacement rope. Simultaneously, the climbing mechanism drives the detector to move upwards around the outside of the cable to inspect it. By using the replacement rope to bear the friction and compression forces during the climbing process, the problem of secondary damage to the cable during existing climbing inspection processes is effectively solved.

Description

Technical Field

[0001] The present invention relates to a testing device, and more particularly to a bridge cable protection testing device applied in the field of bridge testing. Background Technology

[0002] Inspection of bridge cables is an important part of routine bridge maintenance. Cables are generally only used in large suspension bridges and cable-stayed bridges. The cables on suspension bridges are divided into suspension cables and main cables. Main cables have a larger diameter and a gentler slope, and usually have a dedicated inspection channel to facilitate close-range inspection by maintenance personnel. As for suspension cables, they have a smaller diameter and are vertical, making it inconvenient for maintenance personnel to inspect the surface of the suspension cables.

[0003] Currently, most methods involve a crawling mechanism that climbs up the sling and performs inspections during the process. This crawling mechanism uses friction wheels and tensioning wheels to hold the sling tightly, and the friction forces cause the friction wheels to roll over the sling. This crawling method causes the friction wheels to be in constant contact with the sling surface, resulting in continuous secondary damage to the anti-rust coating on the sling surface.

[0004] To address the aforementioned issues, Chinese invention patent CN109736196B discloses a bridge cable inspection device. This device effectively solves the problem of crawling mechanisms in existing cable inspection equipment causing continuous secondary damage to the anti-rust coating on the cable surface. The solution involves replacing the traditional roller pressing of the cable with intermittent clamping and lifting by two sets of upper and lower clamping devices to facilitate the movement of the inspection equipment. This effectively reduces the contact time and total contact area between the inspection equipment and the cable, and also effectively reduces secondary damage to the anti-rust coating on the cable surface caused by the inspection equipment.

[0005] However, even though the above-mentioned technology reduces the contact time and total contact area between the testing equipment and the sling by alternating clamping from top to bottom, it still does not fundamentally solve the problem of secondary damage to the sling. There are still multiple locations on the sling that have been clamped and contacted by the testing equipment. Summary of the Invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that during the climbing process, the sling inspection equipment generates a large amount of contact friction with the sling, which causes significant secondary damage to the anti-rust coating on the surface of the sling.

[0007] To address the aforementioned problems, this invention provides a cable protection testing device for bridges, comprising a crawling mechanism and a detector fixedly connected to the crawling mechanism, and a non-destructive pre-climbing device. The non-destructive pre-climbing device includes a suspension box, with a pair of clamping components installed at the top inner end of the suspension box. An impact-resistant plate located below the clamping components is fixedly connected inside the suspension box. A replacement rope and a pair of airflow hoses are connected to the lower end of the suspension box, and the airflow hoses penetrate the bottom end of the suspension box and communicate with its interior.

[0008] The method of using the above-mentioned bridge cable protection testing equipment includes the following steps:

[0009] S1. The non-destructive pre-climbing device is sleeved on the outside of the cable from the side, and the two are not tightly bound together.

[0010] S2. Connect the ends of a pair of airflow hoses away from the suspension box to a pair of inflation devices. Then start the inflation devices and simultaneously introduce gas into the pair of airflow hoses at the same rate. After passing through the airflow hoses, the gas finally acts on the lower end of the impact-resistant plate, causing the suspension box to move upward along the cable under the thrust of the gas.

[0011] S3. When the suspension box rises to the top of the cable, activate the clamping assembly to clamp the cable, so that the suspension box is clamped at the top of the cable, and at the same time turn off the inflation device.

[0012] S4. Place the crawling mechanism on the outside of the end of the replacement rope that hangs down to the ground, and place the detector on the outside of the cable. Start the crawling mechanism to make it climb up along the replacement rope. At this time, the crawling mechanism drives the detector to move up along the outside of the cable to detect the cable.

[0013] As a further supplement to this application, a pair of flow-concentrating grooves are provided at the lower end of the impact-resistant plate, and the pair of flow-concentrating grooves are respectively located on the upper side of a pair of airflow hoses.

[0014] As a further supplement to this application, the clamping assembly includes a pair of semicircular rings and a pair of semiconical blocks. Each of the two semicircular rings has a conical groove at one end that is close to the other. The semiconical blocks are located inside the conical grooves and the two are matched. A top plate is fixedly connected to the outer end of the semicircular rings. An electromagnet is fixedly connected to the lower end of the top plate. A magnetic block attracted by a powered magnet is fixedly connected inside the semiconical block. A flexible pad is fixedly connected to the inner wall of the semiconical block.

[0015] As a further supplement to this application, the inner wall of the conical groove is provided with an inner inclined groove, and the outer end of the semi-conical block is fixedly connected to a slider. The slider is slidably connected to the inside of the inner inclined groove, and the end of the slider and the inner wall of the inner inclined groove are coated with a magnetic coating.

[0016] As a further supplement to this application, the top plate has a screw groove at its upper end, and the inner top of the suspension box has a pair of screw holes, which are connected by screws.

[0017] As a further supplement to this application, both the suspension box and the impact-resistant plate are provided with through grooves, and the through grooves are located between a pair of flexible pads.

[0018] As another improvement of this application, the airflow hose includes multiple hose sleeves connected end to end. The two ends of the hose sleeves are respectively fixedly connected to a main connector and a secondary connector, and the hose sleeve, the main connector and the secondary connector are interconnected. The upper secondary connector is threadedly connected to the adjacent lower main connector, and the uppermost hose sleeve is fixedly connected to the lower end of the suspension box through the main connector.

[0019] As another improvement of this application, the replacement rope includes a rope body and a connector fixedly connected to the upper end of the rope body. The inner bottom surface of the suspension box is fixedly connected to a mounting cover with an opening facing downwards. The connector moves through the bottom end of the suspension box and is threadedly connected to the inside of the mounting cover.

[0020] As a further supplement to this application, the detector includes a main body plate fixedly connected to the crawling mechanism, a detection frame fixedly connected to the end of the main body plate away from the crawling mechanism, and a plurality of evenly distributed cameras fixedly connected to the inner wall of the detection frame.

[0021] As a further supplement to this application, the upper and lower sides of the detection frame are provided with limiting rings. The limiting rings include a pair of limiting frames rotatably connected to the outer end of the main body plate. The ends of the pair of limiting frames that are close to each other are fixedly connected with screw hole plates, and the pair of screw hole plates are connected by bolts.

[0022] In summary, this application first employs an airflow-driven method to allow the non-destructive pre-climbing device to move upwards in a suspended manner around the cable without tightly gripping it, thus minimizing the risk of secondary damage to the cable surface, until it reaches the top of the cable. After the non-destructive pre-climbing device tightly grips the top of the cable, a replacement rope is used instead of the cable as the climbing carrier, allowing the climbing mechanism to climb along the replacement rope. Simultaneously, the climbing mechanism drives the detector to move upwards around the outside of the cable to inspect it. By using the replacement rope to bear the friction and compression forces during the climbing process, the problem of secondary damage to the cable during existing climbing and inspection processes is effectively solved. Attached Figure Description

[0023] Figure 1 This is a general diagram of the implementation process of this application;

[0024] Figure 2 For the implementation process of this application Figure 1 ;

[0025] Figure 3 For the implementation process of this application Figure 2 ;

[0026] Figure 4 This is a partial cross-sectional perspective view of the non-destructive pre-climbing device of this application;

[0027] Figure 5 This is a partial frontal structural diagram of the non-destructive pre-climbing device of this application. Figure 1 ;

[0028] Figure 6 This is a partial frontal structural diagram of the non-destructive pre-climbing device of this application. Figure 2 ;

[0029] Figure 7 This is a partial perspective view of the clamping component of this application;

[0030] Figure 8 For the three-dimensional crawling mechanism and detector of this application Figure 1 ;

[0031] Figure 9 For the three-dimensional crawling mechanism and detector of this application Figure 2 ;

[0032] Figure 10 This is a partial front view of the airflow hose in Embodiment 2 of this application;

[0033] Figure 11 This is a partial side view of the non-destructive pre-climbing device in Embodiment 2 of this application;

[0034] Figure 12 This is a partial front view of the non-destructive pre-climbing device in Embodiment 3 of this application.

[0035] Explanation of the labels in the diagram:

[0036] 1 Suspension box, 2 Clamping assembly, 21 Semicircular ring, 2101 Conical groove, 2102 Inner inclined groove, 22 Semi-conical block, 23 Flexible pad, 24 Top plate, 25 Electromagnet, 26 Screw, 27 Slider, 3 Impact-resistant plate, 301 Converging groove, 4 Airflow hose, 41 Hose sleeve, 42 Main connector, 43 Secondary connector, 5 Replacement rope, 51 Rope body, 52 Connector, 6 Crawling mechanism, 7 Detector, 71 Main plate, 72 Limiting frame, 73 Screw hole plate, 74 Detection frame, 75 Camera, 8 Through groove, 9 Mounting cover, 10 Distance sensor. Detailed Implementation

[0037] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0038] Implementation method 1:

[0039] This invention provides a cable protection testing device for bridges. Please refer to [link / reference]. Figure 1The system includes a non-destructive pre-climber, a crawling mechanism 6, and a detector 7 fixedly connected to the crawling mechanism 6. The crawling mechanism 6 adopts the existing crawling device structure, which will not be elaborated here. The non-destructive pre-climber includes a suspension box 1. A pair of clamping components 2 are installed at the top of the suspension box 1. An impact-resistant plate 3 located below the clamping components 2 is fixedly connected inside the suspension box 1. A replacement rope 5 and a pair of airflow hoses 4 are connected to the bottom of the suspension box 1. The airflow hoses 4 pass through the bottom of the suspension box 1 and communicate with its interior. The replacement rope 5 can be made of fiber composite material with a rough surface and high strength, which can meet the requirements of facilitating the climbing of the crawling mechanism 6 and being able to withstand the force applied when the crawling mechanism 6 climbs.

[0040] Combination Figures 1-3 As shown, the method of using the above-mentioned bridge cable protection testing equipment includes the following steps:

[0041] S1. The non-destructive pre-climbing device is sleeved on the outside of the cable from the side, and the two are not tightly bound together.

[0042] S2. Connect the ends of a pair of airflow hoses 4 away from the suspension box 1 to a pair of inflation devices. Then start the inflation devices and simultaneously introduce gas into the pair of airflow hoses 4 at the same rate. After passing through the airflow hoses 4, the gas finally acts on the lower end of the impact plate 3, causing the suspension box 1 to move upward along the cable under the thrust of the gas.

[0043] Since the non-destructive pre-climber and the cable are in a non-clamping state, that is, there is no obvious friction between the two. At this time, on the one hand, the non-destructive pre-climber's own weight is overcome by airflow thrust, so that the non-destructive pre-climber can move smoothly upward along the cable. On the other hand, the suspension box 1 is not likely to cause secondary damage to the cable surface.

[0044] S3. When the suspension box 1 rises to the top of the cable, activate the clamping assembly 2 to clamp the cable, so that the suspension box 1 is clamped at the top of the cable, and at the same time turn off the inflation device.

[0045] S4. The crawling mechanism 6 is fitted onto the outer side of the end of the replacement rope 5 that hangs down to the ground, and the detector 7 is fitted onto the outer side of the cable. The crawling mechanism 6 is started to climb up along the replacement rope 5. At this time, the crawling mechanism 6 drives the detector 7 to move up along the outer side of the cable to detect the cable.

[0046] After the non-destructive pre-climbing device is tightly held at the top of the cable, a replacement rope 5 is used instead of the cable as the climbing carrier, so that the climbing mechanism 6 climbs along the replacement rope 5. At the same time, the detector 7 moves upward around the outside of the cable to detect the cable. By using the replacement rope 5 to bear the friction and extrusion forces during the climbing process, the problem of secondary damage to the cable during the existing climbing detection process is effectively solved.

[0047] Please see Figure 5The lower end of the impact plate 3 is provided with a pair of flow-gathering grooves 301. The pair of flow-gathering grooves 301 are located directly above the pair of airflow hoses 4. The flow-gathering grooves 301 can gather the airflow ejected from the nozzle of the airflow hose 4, so that the airflow is concentrated and acts on the impact plate 3, which can effectively push it upward and make it move upward around the cable.

[0048] Combination Figures 5-7 The clamping assembly 2 includes a pair of semicircular rings 21 and a pair of semiconical blocks 22. Each of the semicircular rings 21 has a conical groove 2101 at one end close to the other. The semiconical blocks 22 are located inside the conical grooves 2101 and the two are matched. A top plate 24 is fixedly connected to the outer end of the semicircular rings 21. An electromagnet 25 is fixedly connected to the lower end of the top plate 24. A magnetic block attracted by the power supply magnet 25 is fixedly connected inside the semiconical blocks 22. A flexible pad 23 is fixedly connected to the inner wall of the semiconical blocks 22. An inner inclined groove 2102 is formed on the inner wall of the conical groove 2101. A slider 27 is fixedly connected to the outer end of the semiconical blocks 22. The slider 27 is slidably connected to the inside of the inner inclined groove 2102. The end of the slider 27 and the inner wall of the inner inclined groove 2102 are coated with a magnetic coating. A screw groove is formed at the upper end of the top plate 24. A pair of screw holes are formed at the inner top of the suspension box 1. The screw groove and the screw holes are connected by screws 26.

[0049] Both the suspension box 1 and the impact-resistant plate 3 are provided with through grooves 8, and the through grooves 8 are located between a pair of flexible pads 23. In the specific implementation process, the width of the groove opening of the through groove 8 can be set to a size that allows 2-4 fingers to be inserted into the suspension box 1, such as 4-7 cm. In this way, while the cable is put into the suspension box 1, the hand can also move the clamping component 2, making it convenient to put the cable between a pair of clamping components 2.

[0050] Installation process of the non-destructive pre-climbing device: First, remove screw 26, separate the pair of clamping components 2, insert the cable through the through slot 8 into the inside of the pair of suspension boxes 1, then wrap the pair of clamping components 2 around the outside of the cable, and fix the top plate 24 and the suspension box 1 again with screw 26, so that the cable... Figure 5 As shown in the figure, it is stable between a pair of half-cone blocks 22.

[0051] During the upward movement of the non-destructive pre-climbing device along the cable, the electromagnet 25 is not energized. At this time, under the action of gravity, the semi-cone block 22 drives the slider 27 to stop at the lowest position of the inner inclined groove 2102. Under the magnetic attraction of the magnetic coating, the slider 27 penetrates into the inner inclined groove 2102, causing the flexible pad 23 to move away from the cable. The clamping component 2 not only has no clamping effect on the cable, but there is also a certain gap between the two, making it difficult for the non-destructive pre-climbing device to come into contact with the cable during the upward movement. Figure 6As shown, when the non-destructive pre-climber moves to the top of the cable under the thrust of the airflow, the electromagnet 25 is activated. After being energized, it will attract the magnetic block inside the semi-cone block 22 and move it upward, thereby driving the semi-cone block 22 to move upward along the conical groove 2101. At the same time, it moves closer to the cable and squeezes it, thus achieving the clamping effect on the cable (this is consistent with the clamping method in the prior art).

[0052] Please see Figure 8 and Figure 9 The detector 7 includes a main plate 71 fixedly connected to the crawling mechanism 6. A detection frame 74 is fixedly connected to the end of the main plate 71 away from the crawling mechanism 6. Multiple evenly distributed cameras 75 are fixedly connected to the inner wall of the detection frame 74. Cable limiting rings are provided on the upper and lower sides of the detection frame 74. The cable limiting rings include a pair of limiting frames 72 rotatably connected to the outer end of the main plate 71. A screw hole plate 73 is fixedly connected to the end of the pair of limiting frames 72 that are close to each other. The pair of screw hole plates 73 are connected by bolts. The pair of limiting frames 72 play a limiting role on the cable within a certain range, making it difficult for the cable to detach from the inside of the detection frame 74, and facilitating the multiple cameras 75 to conduct all-round detection of the cable.

[0053] The second implementation method:

[0054] Based on Embodiment 1, this embodiment makes the following specific modifications to the structure of the airflow hose 4 and the replacement rope 5: (Combined with...) Figure 4 and Figure 10 The airflow hose 4 includes multiple hose sleeves 41 connected end to end. The two ends of the hose sleeve 41 are respectively fixedly connected to a main connector 42 and a secondary connector 43, and the hose sleeve 41, the main connector 42 and the secondary connector 43 are interconnected. The upper secondary connector 43 is threadedly connected to the adjacent lower main connector 42. The uppermost hose sleeve 41 is fixedly connected to the lower end of the suspension box 1 through the main connector 42. In use, the multiple hose sleeves 41 can be combined and connected according to the length of the cable through the detachable connection of the main connector 42 and the secondary connector 43, so that the length of the airflow hose 4 meets the cable length requirement, and the suspension box 1 is pushed to the top of the cable under the action of airflow. After the test is completed, the multiple hose sleeves 41 can be disassembled and separated for convenient storage of this application.

[0055] Please see Figure 11 The replacement rope 5 includes a rope body 51 and a connector 52 fixedly connected to the upper end of the rope body 51. The inner bottom surface of the suspension box 1 is fixedly connected to a mounting cover 9 with an opening facing downwards. The connector 52 movably passes through the bottom end of the suspension box 1 and is threadedly connected to the inside of the mounting cover 9. Through the cooperation of the two, the replacement rope 5 can be connected and disassembled on the suspension box 1, which makes it convenient to select replacement ropes 5 of different lengths according to the cable length. At the same time, after use, the replacement rope 5 can be disassembled from the suspension box 1, which makes it convenient to store the suspension box 1.

[0056] The third implementation method:

[0057] Based on Embodiment 1 or Embodiment 2, this embodiment adds a distance sensor 10 to the lower end of the suspension box 1. During the detection process in step S4, the height of the suspension box 1 can be monitored in real time by the distance sensor 10, thereby determining whether the suspension box 1 and the clamping component 2 are in a stable clamping state on the cable, which plays a safety protection role in the cable detection process. When the suspension box 1 and the clamping component 2 experience a clamping failure, causing the suspension box 1 to slide down from the top of the cable, the height data monitored by the distance sensor 10 changes significantly. At this time, the inflation device can be restarted to apply airflow thrust to the non-destructive pre-climber, reducing the sliding speed of the non-destructive pre-climber, thereby effectively reducing the dangerous accidents caused to ground personnel by the rapid sliding of the non-destructive pre-climber.

[0058] In light of current practical needs, the above-described embodiments adopted in this application are not limited to this scope of protection. Various changes made within the knowledge of those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A cable protection detection device for bridges, comprising a crawling mechanism (6) and a detector (7) fixedly connected to the crawling mechanism (6), characterized in that: It also includes a non-destructive pre-climbing device, which includes a suspension box (1), a pair of clamping components (2) installed at the top inner end of the suspension box (1), an impact-resistant plate (3) located below the clamping components (2) is fixedly connected inside the suspension box (1), and a replacement rope (5) and a pair of airflow hoses (4) are connected to the lower end of the suspension box (1), and the airflow hoses (4) penetrate the bottom end of the suspension box (1) and communicate with its interior; The method of using the above-mentioned bridge cable protection testing equipment includes the following steps: S1. The non-destructive pre-climbing device is sleeved on the outside of the cable from the side, and the two are not tightly bound together. S2. Connect the ends of a pair of airflow hoses (4) away from the suspension box (1) to a pair of inflation devices respectively. Then start the inflation devices and simultaneously introduce gas at the same rate into the pair of airflow hoses (4). After passing through the airflow hoses (4), the gas finally acts on the lower end of the impact plate (3), so that the suspension box (1) moves upward along the cable under the thrust of the gas. S3. When the suspension box (1) rises to the top of the cable, activate the clamping assembly (2) to clamp the cable, so that the suspension box (1) is clamped at the top of the cable, and at the same time close the inflation device. S4. Place the crawling mechanism (6) on the outside of the end of the replacement rope (5) that hangs down to the ground, and place the detector (7) on the outside of the cable. Start the crawling mechanism (6) to make it climb upward along the replacement rope (5). At this time, the crawling mechanism (6) drives the detector (7) to move upward along the outside of the cable to detect the cable. The lower end of the impact-resistant plate (3) is provided with a pair of flow-gathering grooves (301). The pair of flow-gathering grooves (301) are located on the upper side of a pair of airflow hoses (4). The clamping assembly (2) includes a pair of semi-circular rings (21) and a pair of semi-conical blocks (22). The ends of the pair of semi-circular rings (21) that are close to each other are provided with conical grooves (2101). The semi-conical blocks (22) are located inside the conical grooves (2101) and the two match. The outer end of the semi-circular rings (21) is fixedly connected to a top plate (24). The lower end of the top plate (24) is fixedly connected to an electromagnet (25). The interior of the semi-conical blocks (22) is fixedly connected to a magnetic block attracted by the power supply magnet (25). The inner wall of the semi-conical blocks (22) is fixedly connected to a flexible pad (23).

2. The cable protection testing equipment for bridges according to claim 1, characterized in that: The inner wall of the conical groove (2101) is provided with an inner inclined groove (2102). The outer end of the semi-conical block (22) is fixedly connected to a slider (27). The slider (27) is slidably connected to the inside of the inner inclined groove (2102). The end of the slider (27) and the inner wall of the inner inclined groove (2102) are both coated with a magnetic coating.

3. The cable protection testing equipment for bridges according to claim 1, characterized in that: The top plate (24) has a screw groove at its upper end, and the inner top of the suspension box (1) has a pair of screw holes. The screw groove and screw holes are connected by screws (26).

4. The cable protection testing equipment for bridges according to claim 1, characterized in that: Both the suspension box (1) and the impact-resistant plate (3) are provided with through grooves (8), and the through grooves (8) are located between a pair of flexible pads (23).

5. The cable protection testing equipment for bridges according to claim 1, characterized in that: The airflow hose (4) includes multiple hose sleeves (41) connected end to end. The two ends of the hose sleeve (41) are respectively fixedly connected to a main pipe (42) and a secondary pipe (43). The hose sleeve (41), the main pipe (42) and the secondary pipe (43) are connected. The upper secondary pipe (43) is threadedly connected to the adjacent lower main pipe (42). The uppermost hose sleeve (41) is fixedly connected to the lower end of the suspension box (1) through the main pipe (42).

6. The cable protection testing equipment for bridges according to claim 1, characterized in that: The replacement rope (5) includes a rope body (51) and a connector (52) fixedly connected to the upper end of the rope body (51). The inner bottom surface of the suspension box (1) is fixedly connected to an opening-facing mounting cover (9). The connector (52) movably passes through the bottom end of the suspension box (1) and is threadedly connected to the inside of the mounting cover (9).

7. The cable protection testing equipment for bridges according to claim 1, characterized in that: The detector (7) includes a main plate (71) fixedly connected to the crawling mechanism (6). A detection frame (74) is fixedly connected to one end of the main plate (71) away from the crawling mechanism (6). A plurality of evenly distributed cameras (75) are fixedly connected to the inner wall of the detection frame (74).

8. A bridge cable protection testing device according to claim 7, characterized in that: The detection frame (74) is provided with limiting rings on both the upper and lower sides. The limiting rings include a pair of limiting frames (72) rotatably connected to the outer end of the main body plate (71). The ends of the pair of limiting frames (72) that are close to each other are fixedly connected with screw hole plates (73). The pair of screw hole plates (73) are connected by bolts.

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